Lavatory sink



FIG. 1 is a perspective view of front, right and top plan side of a lavatory sink showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a right side view thereof; the left side view being mirror image thereof;

FIG. 7 is a cross sectional view at 7—7 in FIG. 2; and,

FIG. 8 is a cross sectional view at 8—8 in FIG. 6.

The portions of the article in broken lines are shown for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a lavatory sink, as shown and described. 